de steiger



(No Model.)

W. E. MARLBTT.

DEVICE POR OPERATING THE DOORS TO ELBVATOR SHAFTS. l No. 433,901.Patented Aug. 5, 1890.

A 45%; MMM

` UNITED STATES PATENTOFFICE.

VILLIAM E. MARLETT, OF LA SALLE, ILLINOIS, ASSIGNOR OF TVO-THIRDS TOPHILIP R. DE STEIGER, AUGUST F. DE STEIGER, JOSEPH L. DE STEIGER, ANDEDVARD A. DE STEIGER, ALL OF SAME PLACE.

DEVICE FIOR OPERATING THE DOORSv TO ELEl/AVOR-SHAFTS.

SPECIFICATION forming part of Letters Patent No. 433,901, dated August5, 1890. Application iiled November 19, 1889. Serial No. 330,852. (Nomodel.)

T0 all whom it may concern:

Be it known that I, WILLIAM E. MARLETT, a citizen of the United States,residing at La Salle, in the county of La Salle and State of Illinois,have invented certain new and useful Improvements in Doors forElevator-Shafts; and I do declare the following to be a full, clear, andexact description ofI the invention` such as will enable others skilledin the art to which it appertains to make and use the same.

My invention relates to certain new and useful improvements in doors forelevatorshafts or hatchways.

The nature of the invention will be understood from' the followingdescription, when taken in connection with the accompanying drawings, inwhich- Figure l is a view in perspective of the 0perative parts of myinvention, the outlines of one iioor being shown; Fig. 2, a view inelevation, the doors in this view being shown open; and Fig. 3, a viewin detail of a rack secured to the cage or coach.

In the drawings, A represents one door of a building, and B B boxes orcasings situated upon opposite sides of an elevator-shaft or hatchway,such boxes or casings extending, preferably, from the bottom to the topof the shaft. At points equidistant from one floor of the building,above and below the same, one casing Bis provided with slots a., througheach of which the teeth of a cog b protrude, such cogs being suitablymounted upon short shafts having bearings in the casing. One

a face of each cog b is formed into a pinion c,

"each of which meshes with a beveled pinion d, pinions CZ being mountedupon a vertical shaft C, one at the upper and the other at the lower endthereof. Shaft O has bearing at each end in a box D, as clearly shown,and at a point at or about its center is formed with a screw E, suchscrew extending a suitable distance both above and below the floorline.

The casing B is provided with two slots e, formed through thediametrically-opposite faces of such casing, these slots being formeddirectly opposite that portion of the shaft which is formed into screwE. v

' the doors being thus caused to move in the F F represent the twodoors, which are preferably cut away, as shown, on their inner edges toform a close Vjoint with the casings B. The size of these two doors,when considered together, is such that they Will extend entirely overthe shaft or hatchway, thus entirely .closing the same. These doors arepivoted at each end in brackets G, secured to the casings B, and one endof each door is provided with a quadrant-shaped frame H, each of whichcarries on its arc-shaped face a series of teeth or cogs f, the partsbeing so arranged that the arc-shaped faces of the frames H and theteeth f mounted thereon will pass into the interior of the casing, theteeth engaging the screw and adapted to be operated thereby.

I, Fig. 3, represents the cage orcoach, which is provided on the outerface of two of its sides with a rack g, preferably of the forni shown,such racks lbeing arranged to engage and operate the cogs b.

The operation is as follows: The cage or coach being at the bottom ofthe shaft, the normal position of the doors at each landing will be suchthat they will be closed, the doors occupying the horizontal positionshown in Fig. 1 of the drawings, thus completely covering the shaft ateach landing. The cage being started on its upward course at a suitabletime before its top reaches the line of the floor, the ruck upon oneside will engage the cog situated beneath the iioor and cause therevolution thereof. In this way motion is imparted to the pinionsdescribed, and through them to the shaft and the screw formed therewith.I The revolution of the screw will serve, through the medium of the cogsor teeth named, to revolve the quadrantshaped frames to which the doorsare secured,

9o arc of a circle until they occupy the vertical position shown in Fig.3 of the drawings. As they reach that position, the top of the'cagepasses them and the first landing is reached. The continued ascent ofthe cage will bring the same rack into mesh with the cog on thev upperend of the shaft C, and through the medium of a line of gearing similarto that described and operating in the same manner close the doors, thissecond cog being so situated with respect to the line of the floor as tocause the complete closing of the doors irnmediately after the lower endof the cage has ascended above the line of the floor. This operation isrepeated at each landing, the operative mechanism being arranged,falternately, upon opposite sides of the shaft. The lowering of the cagewill cause the same manipulation of J(he doors.

What I claim isd In a device for opening and closing doors WILLIAM E.MARLETT. Witnesses:

V. J. DUNCAN, THEoDoRE K. HOLMES.

